The document describes how to integrate the Google Chart API into a PHP web application to generate charts from database data without having to rebuild charting functionality. It involves: 1) Creating a database table to store sample selling data 2) Using PHP to fetch data from the database and generate a JSON file in the required format for the Chart API 3) Including JavaScript code on a PHP page to call the Chart API, pass it the JSON file, and render the chart This allows developers to reuse existing charting capabilities from the Google Chart API rather than rebuilding charting systems themselves, saving development time and effort.

1. International Journal of Trend in Scientific Research and Development, Volume 1(2), ISSN: 2456-6470
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API Integration in Web Application
Dr. Chetan R. Dudhagara
Assistant Professor
Computer Science Department
N. V. Patel College of Pure and Applied Sciences
Vallabh Vidyanagar, Gujarat
Mr. Ashish Joshi
Assistant Professor
BCA Department
V.P. & R.P.T.P. Science College
Vallabh Vidyanagar, Gujarat
Abstract - Application Program Interface (API) widely used for
the programmers. It helps programmers to focus on their
programming rather than the other features. API provides the
facility to programmer for use the “Predefined Code”. Among
them one type of API provides by the google that is chart API.
Chart API is used to generate the chart from the data which are
available on our database. Sometimes it would be very hard to
develop such type of another system. Rather than we can use
API and save the time and effort that can be use at proper place.
This paper will describe how we can integrate the google chart
API in the php website.
Keywords : API, PHP, Mysql, JSON, Payroll, Interface
I. INTRODUCTION
It is same as headache to develop another system for the basic
required system for the web developers. For examples company
requires to establish a chart in web application for monthly
selling. The main application is the company’s web site but you
have to develop another application through that you can create
the chart. So developer requires more time and efforts. Basically
this facility is available that is developed by another developer so
why we should spend time to re build it. Simply we can integrate
it and use it. Generally user use the google chart API tool to
generate the chart from given data base. In this paper we
describe how to integrate google chart API with php.
II. METHODOLOGY
We are using one chart API that provides by google through that
we can use the predefined code and use it in our web application.
Basically this code can be integrated with any server side
scripting language. Here I am taking the example of php. In this
example we discuss to integrated the google chart API with php
file. The following steps are use for it.
1. Create database as payroll and create table as sell as per
following
Fig. 1 : database structure
As you can see in above Fig. 1, there are three columns in this
table as id, month and sell that describe the data about selling of
that month.
2. Create blank JSON (Java Script Object Notation) file as
json_data.json. It is very important because the API can read this
file only. JSON is the technology through that you can pass the
data from one application to another. The file appears after
writing data by script looks like below.
{"cols":[ {"id":"","label":"month","pattern":"","type":"number"},
{"id":"","label":"selling","pattern":"","type":"number"} ],
"rows":[ {"c":[{"v":"1","f":null},{"v":2000,"f":null}]},
{"c":[{"v":"2","f":null},{"v":3000,"f":null}]},
{"c":[{"v":"3","f":null},{"v":500,"f":null}]},
{"c":[{"v":"4","f":null},{"v":5000,"f":null}]},]}

2. International Journal of Trend in Scientific Research and Development, Volume 1(2), ISSN: 2456-6470
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3. Create PHP file as get_data.php. This file will fetch the data
from the data base and write the JSON file. The code is as per
following:
<?php
$t='{"cols":[{"id":"","label":"month","pattern":"","type"
:"number"},
{"id":"","label":"selling","pattern":"","type":"number"}
],"rows": ['; file_put_contents("json_data.json",
$t);
$con=mysql_connect("localhost","root","");
mysql_select_db("payroll",$con);
$res = mysql_query("SELECT month,sell FROM sell");
while($row=mysql_fetch_array ($res)) {
$a=$row['month'];
$b=$row['sell'];
$t1='{"c":[{"v":"';
$t1 .=$a;
$t1 .='","f":null},{"v":';
$t1 .=$b;
$t1 .=',"f":null}]},';
file_put_contents("json_data.json",$t1,
FILE_APPEND);}
file_put_contents("json_data.json","]}",
FILE_APPEND);
$string = file_get_contents ("json_data.json");
echo $string;
?>
4. Create another file as sell_analysis.php. It will call the
get_data.php file and send the JSON file to the API server. API
server will read it properly and generate the chart related to the
data and respond to the application. The code is as per following.
This code generated by API server, you have to do some changes
as per your requirement.
<html>
<head>
<style>
.head
{ font-family:verdana;
font-size:14px;
background-color:#000066;
color:#FFFFFF; }
.head1
{ font-family:verdana;
font-size:24px;
color:blue; }
.data
{ font-family:verdana;
font-size:12px;
font-weight:bold; }
</style>
<!-- Note : This code is available on API provider.-->
<!--Load the AJAX API-->
<script type="text/javascript"
src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="//ajax.googleapis.
com/ajax/libs/jquery/1.10.2/jquery.min.js"></scrip>
<script type="text/javascript">
google.load('visualization','1', {'packages':['corechart']});

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google.setOnLoadCallback(drawChart);
function drawChart() {
var jsonData = $.ajax({
url: "get_data.php",
dataType: "json", async: false
}).responseText;
// Create our data table out of JSON data loaded from server.
var data = new
google.visualization.DataTable(jsonData);
var options = {
title : 'Monthwise Selling Analysis',
vAxis: {title: "Selling Growth"},
hAxis: {title: "Month"},
seriesType: "bars",
series: {1: {type: "line"}},
series: {2: {type: "line"}}, 'hieght':400, 'width':920 };
// Instantiate and draw our chart, passing in some
options.
var chart = new google.visualization.ComboChart
(document.getElementById('chart_div'));
chart.draw(data,options);
}
</script> </head>
<body>
<!--Div that will hold the pie chart-->
<br><br><br><br><br><br><br><br><br><br>
<center>
<div id="chart_div" height="400" width="600" > </div>
</center>
</body>
</html>
5. Finally this code will generate the chart.
Fig. 2 : chart
As per overall process, you have to run only sell_analysis.php
file, it will automatically call the get_data.php file as per written
script in it.
III. FUTURE WORK
It is important use the google chart API to generate the charts
from database. This paper concludes that how can implement the
chart API in php (server side scripting language). It can also be
use with different server side scripting language like asp.net, jsp
etc. Thus google have many more API so I will try to implement
another API which can be also helpful to reduce the extra work
and concentrating on main work.

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IV. CONCLUSION
This paper concludes that google API provides facility to
generate the chart from the XML or JSON files, but how we can
create and integrate JSON file. The chart API is worth for time
and effort saving. By using this facility we can generate various
types of charts such as bar chart, pie chart, line charts, etc. The
authors have contributed here to use the server side scripting
language for google chart API. Here we use php as a server side
scripting language.
V. REFERENCES
[1] Beginning of php By Elizabeth Naramore
[2] High Performance MySQL By Jeremy D. Zawodny, Derek J.
Balling
[3] Javascriot & AJAX By Tom Negrino and Dori Smith
[4] Full Web Building Toutorials www.w3schools.com
[5] PHP Manual.chm http://www.php.net/docs.php
[6] www.google.com